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Two pipe diameters are being considered for a liquid transport system (2 and 2.5). How much energy cost do we save or lose if we

Two pipe diameters are being considered for a liquid transport system (2 and 2.5). How much energy cost do we save or lose if we change the diameter of the pipe if we make such a change? The cost of electrical energy needed for the pump is $0.05 USD/kWh and it operates with an efficiency of 75%.

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